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BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...数设置成一样。 之所以要这么设计,是为了防止在批量测试或者使用设备时,由于多个设备的同时广播,而形成数据风暴,防止设备之间的干扰。 扫描扫描类别主动扫描:设备主动扫描来获取更多对端设备的信息上报Host,为...
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What is the difference between angular-route and angular-ui-router?

I'm planning to use AngularJS in my big applications. So I'm in the process to find out the right modules to use. 15 Answ...
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difference between primary key and unique key

I'm using mysql database. I have a confusion between primary key and unique key. 15 Answers ...
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How do I get python's pprint to return a string instead of printing?

... documentation: Return the formatted representation of object as a string. indent, width and depth will be passed to the PrettyPrinter constructor as formatting parameters. Example: >>> import pprint >>> people = [ ... {"first": "Brian", "last": "Kernighan"}, ... ...
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How to parse Excel (XLS) file in Javascript/HTML5

...ject_array(workbook.Sheets[sheetName]); var json_object = JSON.stringify(XL_row_object); console.log(json_object); }) }; reader.onerror = function(ex) { console.log(ex); }; reader.readAsBinaryString(file); }; }; </script> Below post has the c...
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Chrome, Javascript, window.open in new tab

... this, because it's an option controlled by Internet Explorer users. Opening pages using Window.open with a different window name will open in a new browser window like a popup, OR open in a new tab, if the user configured the browser to do so. EDIT: A more detailed explanation: 1. In modern bro...
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What is the difference between concurrent programming and parallel programming?

What is the difference between concurrent programming and parallel programing? I asked google but didn't find anything that helped me to understand that difference. Could you give me an example for both? ...
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How to track child process using strace?

...a process briefly. The process created 90 threads. When I found the offending thread, I had to tediously search for the parent thread, then the grandparent thread, and so on all the way to the root process. ...
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推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...性用户更倾向于购买护肤品,这就叫交叉属性。通过反复测试和经验,我们可以调整特征属性的组合,拟合出最准确的回归函数。最后得出的属性权重如下: 基于模型的算法由于快速、准确,适用于实时性比较高的业务如新...
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How to move the cursor word by word in the OS X Terminal

I know the combination Ctrl + A to jump to the beginning of the current command, and Ctrl + E to jump to the end. 17 A...